Heatwave Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

QALLY is the best-performing heatwave brand in July 2026, moving 4,000 units across 1 ASIN for 36.4% of Top 10 volume. Foliful follows with 2,000 units (18.2%), ahead of WearMe Pro on 1,000 units (9.1%).

With 10 brands splitting the Top 10 and 63.6% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $16.89 to $49.00, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, 3 ASINs forced its way in: B0FBN1RM6G booked 500 units at $59.00.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.